Electrocatalysis and simultaneous determination of hydroquinone and acetaminophen using PN COF/graphene oxide modified electrode

In this present study, a new porphyrin based covalent organic framework material (PNCOFs) is synthesized by the imidization reaction of tetraminophenyl porphyrin (TAPP) and 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA), and then the obtained COFs were combined graphene oxide (GO) to prepare PNCOFs/GO modified electrode for the simultaneous determination of hydroquinone (HQ) and acetaminophen (AC). The composite material displays a well synergistic effect of high electrocataytic activity of the COFs and good conductivity of GO. Catalytic process and electrochemical oxidation mechanism are discussed. Under the optimum conditions, the detection limits are 1.1 × 10−8 mol L − 1 and 9.0 × 10−9 mol L − 1 for AC and HQ, respectively. The linear ranges are 2.0 × 10−7 mol L − 1 to 1.5 × 10−4 mol L − 1 for AC and 1.0 × 10−7 mol L − 1 to 1.0 × 10−4 mol L − 1 for HQ. This work is beneficial to the electrochemical application of COFs.